DNA Marker Index information for Chromosome: Y Marker: M131.1Names and Aliases for this DNA Marker: M131.1, M131.Chromosome Position in hg38 Human Genome assembly1: 19552492.Chromosome Position in hg19 assembly2: 21714378 .Ancestral marker allele value: gtaatttg.Derived, alternative, or mutated marker allele value: del.